Fire-pot construction



' March 6, 1928.

O. J. GROEHN FIRE'POT CONSTRUCTION Filed Novy 3Q, 1921 2 Sheets-Sheet 1lwueM/ko'z 0 ta rl avda/2 72 Marchl 6, 1928.

1,661,820 o. J. GROEHN FIRE POT CONSTRUCTION 'Filed Nov, SQ, 1921 2She'etSP-Sheet 2 w, www@ Patented Mar. 6, 1928.

unire!) i stares OTTOJ. GROEI-IN, OF DEIJROI'IJ,y l1VIICI"lIIGrA1\T,ASSIGNOR TO CLAYTON &.LA1VIBERT MANU.`

rATENr-,oFFIcri FACTURII'JG COMPANY, OF DETROIT, MICHIGAN, A CORPORATIONOF MICHIGAN.

FIRE-POT CONSTRUCTION.

Application lcdvNovember 30, 1921. Serial No. v518,881.

This invention relates to a fire pot construction and refers moreparticularly to lire pot constructions such as areladopted for plumbersfurnaces and other oil burning devices.

One of the main objects of the invention is to utilize the flamegenerated foi-heating purposes for also heating the generator that r areobtained Without materially changing constructions now in use, and ingeneral to provide a new and improve-d fire pot construction of thecharacter above mentioned. The invention also resides in the novel 'arfrangement of the ears or lugs forming both a bale or handlev connectionand a .stop against which the handle` abuts and in such further detailsof construction and arrangements and combinations of parts as willmorefully hereinafter appear.

In the drawings: y

Fig l is a side elevational View'` partly in section through a plumbersfurnace embodying my invention;

F ig. 2 is a top plan View partly 1n section of the construction shownin Fig. l.

Figs. 3 and 1 are detail views `of the handle ears, and l Figure 5 is adetail transverse sectional view ofthe U-shaped fuel conductor showingthe deflector plate in position.

Describing in detail the construction shown in the drawings, Adesignates the tank of a plumbers furnace having the usual pump A andsupporting standard A2 which carries the combustion chamber4 B, theburner C and drip cup C. The combustion chamber is in the form of a firepot which is open at its upper end and also has an opening at itsforward end providedwith a support l) hinged at D to lugs DL carried bythe wall of the combustion chamber B. The support D is adapted to formasupport for soldering irons and other instruments (not shown), the partof the instrument to be heated projecting into the combustion chamber,while the handle part is supported by the support D. Within this chamberB there is located a U-shaped fuel conductor member E which has arearwardly extending center portion F into which the vaporized fuel forVthe n combustion is discharged through the nozzle At the kpoint of thisdischarge the fuel is mixed with air and returns to the outer members E2of the combustion member E. The members E2 form the burnersv at oppositesides of the combustion chamberi i i i Heretofore it has been customaryin constructions of this kind to havev thevburning gases directedupwardly through holes in the top of the ymembers E2; Inthe presentconstruction l provide the membersE2 `with longitudinally extendingslots H` which open inwardly toward the combustion cham-` ber and bymeans of a defiector plate I the combustion flame from one of theburnersE2` is turned upwardly asshown best in Figure 5. 'In place of makingthis defiectorplate.l for both sides of the U-shapedmember it islpreferably extended upon one side only, as

shown in Figure 5, the combustion fla-me from the burner E2 on the otherside of the combustion chamber being deflected upwardly by thegenerating chamber J. Thus .it will be noted that the outer members E?of the U-shaped fuel conductor E form burners, the fuel mixture passingfrom nozzle G, thence through the center portion E to the slots H oftl'iejburners E2. 'Vithin the mem bers E2 may be located a wire screenE3` or the-like, adapted to assist in mixing the fuel and airconductedto the slots H. The fuel is fed upwardly y'to the genera-tor chamberthrough the ,conduit K which at its upper end opens into a chamber Kwhere it is forced to travel to the end of the tube and back through thelatter to the port K3.

The latter is cont-rolled by a needle valve L y carried by thescrewethreaded.stem L and operated by the usual handle L?. lVhen thisvalve is opened the fuel then passes through the `conduit M Vto the,discharge orifice G which 'iskept clean by means of a cleanput member Ncarried by the screw-threaded stem- U adjusted by the usual `hand wheelN2. It will be noticed that the tube l?? is voffset to lie againstthewall,Owhich .is

directly adjacent the slot H whereA the burning takes place. By thisnovel construction the flame which is used to heatt-he solder] tank orother membersset ,uponl the furnace is also utilized to heat thegenerating ,chaine ber since the fiume from the slot H- will strikeagainst the member Jfthus playing an intense heat upon the generatormember which in turn also acts as'part of the deflector to deflect theflame upwardly. This novel ari-augment not only gives a simple andcompact arrangement but permits of a relatively small drip cup C forstarting the burner and also materially increases theeliiciency of theentire fire pot construction.

In addition to the features above mentioned the invention also residesin the novel construction of handle ears Q. `These ears, asin Figs. 3anda, consist of a metal stamping Rwhich is offset at R and then againinwardly offset at R2. The latterportion carries a tongue or lip S whichextends through a hole in' the wall of the furnace chamber B and is thenbent upwardly in assembling the parts. At its lower end the handle earis provided with bearing portions T and T which are riveted or otherwiserigidly secured to the wall of the lfurnace chamber. The offsetarrangement of the handle ears has a further advantage in that theportion It2 forms a rigid reinforced stop against which the lower partof the handle T abuts when the device is being carried.

YWhat I claim as my invention is:

1. In a fire pot construction for plumbers furnaces or the like, thecombination with a burner having llame discharging means, of ageneratorlocated adjacent to a portion of said flame discharging meansand adapted to deflect a portion of the entire burner llame upwardly,and a plate cooperating withother portions of the flame discharge meansfor deflecting other portions of the said entire flame.

2. In a tire pot construction for plumbers furnaces orthe like, thecombination with a combustionchamber, of a. U-shaped fuel conductorforming burner elements positioned at opposite sides of the combustionchamber, a deilector for directing the flame from one of the burners tothe combustion chamber, and a generator for deflecting the flame fromthe other of said burners to the combustion chamber.

3. In a lire pot construction for plumbers furnaces or the like, thecombination with a U-shaped fuel conductor forming longitudinallyextending burner elements, of a deflector plate for deflect-ing theflame from one of tlic burners, and a generator'for deflect-ing theflame from the other of said burners.

4. In a re pot construction for plumbers furnaces or the like, thecombination with a combustion chamber, of a uplurality of burners belowthe combustion chamber, a deflector for directing the flame from one ofthe burners to the combustion chamber, and a generator for deflectingthe flame from the other of saidburners to the combustion chamber. y

5. In a fire pot construction for plumbers furnaces or the like, thecombination with a fuel discharge nozzle, of a U-shaped burner in frontof said nozzle, said burner having a rearwardly extending center portionbctween the arms of the said U-shaped burner and in the same horizontalplane therewith and into which the fuel from the nozzle is discharged,one side of said U-shaped burner haring a perforation therein, and agenerator located in the aforesaid plane and adjacent to ysaidperforation, and in communication with said nozzle.

(i. In a device of the class described, the

combination with a combustion chamber, of a fuel discharge nozzle, aU-shapcd burner below the combustion chamber, and in coinmunication withsaid nozzle, said burner having a rearwardly extending center portionbetween the arms of the U-shaped burner for receiving the fuel from saidnozzle, and a generator disposed between the arms of the U-shapedburner, one arm of said burner having an opening for directing the flamelaterally against the said generator whereby the flame is deflectedupwardly to the combustion chamber, said burner center portion andgenerator lying substantially in the same plane horizontally. 7. A firepot construction for plumbers furnaces or the like having a fuel supplytank and a combustion chamber above the supply tank in the form of afire pot open at the upper end, a U-shaped fuel conductor forming burnerelements positioned at opposite sides of the combustion chamber adjacentthe bottom of the said fire pot and provided with a'me openings, saidU-shaped conductor having a rearwardly extending center portion betweenthe burner elements and in communication therewith for supplying fuelthereto, a fuel discharge nozzle positioned at the rear of the saidcenter portion for directing fuel thereto, a generator nestedhorizontally between one of said burner elements and the said centerportion, and in communication with said fuel supply tank and saiddischarge nozzle, said generator adapted to be heated by the llame fromthe said flame opening of the said burner element lying adjacent to thegenerator.

8. In a fire pot construction for plumbers furnaces or the like having afuel supply tank and a combustion chamber above the supply tank in theform of a fire pot open at the upper end, a U-shaped furl conductorforming burner elements positioned at opposite sides of the combustionchamber adjacent the bottom of the said fire pot and provided with llameopenings, said U-shapcd conductor having a rearwardly extending centerportion between the burner elements and in communication therewith forsupplying fuel thereto, a fuel discharge nozzle positioned at the rearof the said center portion for directing fuel thereto, a generatorcxtending longitudinally adjacent one of said till l IH

burner elements and in communication with said fuel supply tank and saiddischarge nozzle, said generator being located substantially in theplane of the said burner eleinentsand adapted to be heated by a flamefrom the said burner element lying adjacent the generator.

9. ln a fire pot construction for plumbers furnaces or the like, havinga fuel supply tank and a combustion chamber above the supply tank in theform of a tire pot open at the upper end, a U-sliaped fuel conductorforming burner elements positioned at opposite sides of the combustionchamber adjacent the bottoni of the said fire pot and provided withflame openings, said 'el-shaped conductor having a rearwardly extendingcenter portion between the burner elements and incominunicationtherewith for supplyf ing'fuel thereto, a fuel discharge nozzlepositioned at the rear of the said center portion for directing fuelthereto, a generator extending longitudinally adjacent onevof saidk

